draw-triangle(wt-lcd-device)
wayland/wio-terminal-lcd/draw-triangle(wt-lcd-device)
Draw a triangle.
draw-triangle(wt-lcd-device)
@/draw-triangle(wt-lcd-device)
Draw a triangle.
DEV@/wt-lcd-device
An LCD device.
X0number
Vertex #0 x coordinate.
Y0number
Vertex #0 y coordinate.
X1number
Vertex #1 x coordinate.
Y1number
Vertex #1 y coordinate.
X2number
Vertex #2 x coordinate.
Y2number
Vertex #2 y coordinate.
Colorxod/color/color
Color.
Fillboolean
True to fill triangle with colour, False to draw outline only.
UPDpulse
Update.
Donepulse
Pulse on completion.
C++ implementation
#pragma XOD evaluate_on_pin disable
#pragma XOD evaluate_on_pin enable input_UPD
node {
void evaluate(Context ctx) {
// The node responds only if there is an input pulse
if (!isInputDirty<input_UPD>(ctx))
return;
// Get a pointer to the `TFT_eSPI tft` class instance
auto tft = getValue<input_DEV>(ctx);
XColor color24 = getValue<input_Color>(ctx);
uint16_t color16 = ((color24.r & 0xF8) << 8) | ((color24.g & 0xFC) << 3) | (color24.b >> 3);
if (getValue<input_Fill>(ctx)) {
tft -> fillTriangle(getValue<input_X0>(ctx),
getValue<input_Y0>(ctx),
getValue<input_X1>(ctx),
getValue<input_Y1>(ctx),
getValue<input_X2>(ctx),
getValue<input_Y2>(ctx),
color16);
} else {
tft -> drawTriangle(getValue<input_X0>(ctx),
getValue<input_Y0>(ctx),
getValue<input_X1>(ctx),
getValue<input_Y1>(ctx),
getValue<input_X2>(ctx),
getValue<input_Y2>(ctx),
color16);
}
emitValue<output_Done>(ctx, 1);
}
}